Lincoln Creek

Prospect, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Ag; Hg
Ore minerals gold
Gangue minerals quartz; undetermined carbonate minerals

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale D-2
Latitude 62.77696
Longitude -156.79104
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is on a flat terrace about 2.0 miles south of the top of Crager Mountain. It is at an elevation of about 1,450 feet near the center of section 16, T31 W., R40 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This prospect is in a zone of several northeast-trending, mafic to felsic dikes that intrude shale and sandstone of the Upper Cretaceous, Kuskokwim Group (Bundtzen and Laird, 1982; Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). One dike is a quartz-feldspar porphyry; three others appear to be altered mafic dikes. Rock exposures are found in a series of old test pits and trenches that were dug before 1960 (J. Degnan, oral communication, 1979). Grab samples of rock exposed in the pits contained 0.15 parts per million (ppm) silver, and 1.3 ppm mercury, and free gold was panned from altered dike material. (McGimsey and others, 1988; J. Degnan, oral communication, 1979).
Geologic map unit (-156.793402038438, 62.7763084243712)
Age of mineralization Younger than the Upper Cretaceous host rocks.
Alteration of deposit Mafic dikes altered to silica and carbonate minerals.

Production and reserves

Workings or exploration Trenches and test pits were dug before 1960 (Joe Degnan, oral communication, 1979).
Indication of production None

References